events.c

   1 /*
   2  * events.c
   3  *
   4  * Event queue.
   5  */
   6
   7
   8 #include "input.h"
   9
  10
  11 char keystates[MAX_KEYS];
  12 int nkeysdown;
  13
  14 #define MAX_EVENTS 32
  15
  16 static event_t eventqueue[MAX_EVENTS];
  17 static int eventhead, eventpos;
  18
  19
  20 int ev_postevent(event_t *ev)
  21 {
  22         int nextevent;
  23         nextevent = (eventhead+1)%MAX_EVENTS;
  24         if (nextevent == eventpos)
  25                 return 0;
  26         eventqueue[eventhead] = *ev;
  27         eventhead = nextevent;
  28         return 1;
  29 }
  30
  31 int ev_getevent(event_t *ev)
  32 {
  33         if (eventpos == eventhead)
  34         {
  35                 ev->type = EV_NONE;
  36                 return 0;
  37         }
  38         *ev = eventqueue[eventpos];
  39         eventpos = (eventpos+1)%MAX_EVENTS;
  40         if (ev->type == EV_PRESS)
  41         {
  42                 keystates[ev->code] = 1;
  43                 nkeysdown++;
  44         }
  45         if (ev->type == EV_RELEASE)
  46         {
  47                 keystates[ev->code] = 0;
  48                 nkeysdown--;
  49                 if (nkeysdown < 0) nkeysdown = 0;
  50         }
  51         return 1;
  52 }
  53
  54
  55
  56
  57
  58
  59
  60